Saffron Sage Salmon Salt grass Saltwort (prickly), Russian thistle Sardine (Pilchard) Sardine, Japanese Pilchard Savinase Scale, Lenscale Scallop Scotch broom Seminal fluid Sesame seed Setomelanomma rostrata Sheep epithelium Sheep milk Sheep sorrel Sheep whey Shrimp Silk Silk waste Snail Sole Soya bean Spelt Wheat Spinach Spruce Squid Staphyloccal enterotoxin A Staphyloccal enterotoxin B Staphylococcal enterotoxin C Staphylococcal enterotoxin TSST Stemphylium herbarum Storage mite (Acarus siro) Storage mite (Glycyphagus domesticus) Storage mite (Lepidoglyphus destructor) Storage mite (Tyrophagus putrescentiae) Strawberry Streptavidin Sugar-beet Sugar-beet seed Sunflower Sunflower seed Suxamethonium (Succinylcholine) Sweet chestnut Sweet gum Sweet potato Sweet vernal grass Swine epithelium Swordfish